<template>
    <div class="login_container">
        <div class="login_box">
            <!-- 头像 -->
            <div class="avatar_box">
                <img src="../assets/logo.png" alt="">
            </div>
            <!-- 账号密码登录 -->
            <el-form ref="loginFormRef" :model="loginInput" :rules="loginRules" label-width="0px" class="login_form">
                <!-- 用户名 -->
                <el-form-item prop="username">
                    <el-input v-model="loginInput.username" prefix-icon="iconfont icon-user"></el-input>
                </el-form-item>
                <!-- 密码 -->
                <el-form-item prop="password">
                    <el-input v-model="loginInput.password" prefix-icon="iconfont icon-3702mima" type="password"></el-input>
                </el-form-item>
                <!-- 按钮区域 -->
                <el-form-item class="btns">
                    <el-button type="primary" @click="login">登录</el-button>
                    <el-button type="info" @click="resetLoginForm">重置</el-button>
                </el-form-item>
            </el-form>
        </div>
    </div>
</template>

<script>

export default {
  data () {
    return {
      loginInput: {
        username: 'admin',
        password: '123456'
      },
      loginRules: {
        // 验证账号
        username: [
          { required: true, message: '请输入账号名称', trigger: 'blur' },
          { min: 3, max: 10, message: '长度在 3 到 10 个字符', trigger: 'blur' }
        ],
        // 验证密码
        password: [
          { required: true, message: '请输入密码', trigger: 'blur' },
          { min: 6, max: 15, message: '长度在 6 到 15 个字符', trigger: 'blur' }
          // { pattern: /^[\u4E00-\u9FA5]+$/, message: '用户名只能为中文' }
        ]
      }
    }
  },
  methods: {
    resetLoginForm () {
      // 表单重置方法
      this.$refs.loginFormRef.resetFields()
    },
    login () {
      // 表单预验证
      this.$refs.loginFormRef.validate(async valid => {
        // valid  trun 或false 
        // console.log(valid)
        if (!valid) return
        const { data: res } = await this.$http.post('login', this.loginInput)
        if (res.meta.status !== 200) return this.$message.error('登录失败')
        this.$message.success('登录成功')
        // 将登录成功的token唯一标识 记录在window中
        window.sessionStorage.setItem('token', res.data.token)
        this.$router.push('/home')
      })
    }
  }
}

</script>

<style lang="less" scoped>
.login_container {
    background: #2b4b6b;
    height: 100%;
    position: relative;
}

.login_box {
    width: 450px;
    height: 300px;
    background: #fff;
    border-radius: 3px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);

    .avatar_box {
        width: 130px;
        height: 130px;
        border: 1px solid #eee;
        border-radius: 50%;
        padding: 10px;
        box-shadow: 0 0 10px #ddd;
        position: absolute;
        left: 50%;
        transform: translate(-50%, -50%);
        background: #fff;
        img {
            width: 100%;
            height: 100%;
            border-radius: 50%;
            background: #eee;
        }
    }
}
.login_form {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 0 20px;
    box-sizing: border-box;
}
.btns {
    display: flex;
    justify-content: flex-end;
    padding: 10px 10px
}
</style>
